Abstract
Transition metal oxides exhibit a plethora of electrical and magnetic properties described by their order parameters. In particular, ferroic orderings offer access to a rich spectrum of fundamental physics phenomena, in addition to a range of technological applications. The heterogeneous integration of ferroelectric and ferromagnetic materials is a fruitful way to design multiferroic oxides. The realization of freestanding heterogeneous membranes of multiferroic oxides is highly desirable. In this study, epitaxial BaTiO3/La0.7Sr0.3MnO3 freestanding bilayer membranes are fabricated using pulsed laser epitaxy. The membrane displays ferroelectricity and ferromagnetism above room temperature accompanying the finite magnetoelectric coupling constant. This study reveals that a freestanding heterostructure can be used to manipulate the structural and emergent properties of the membrane. In the absence of the strain caused by the substrate, the change in orbital occupancy of the magnetic layer leads to the reorientation of the magnetic easy-axis, that is, perpendicular magnetic anisotropy. These results of designing multiferroic oxide membranes open new avenues to integrate such flexible membranes for electronic applications.
| Original language | English |
|---|---|
| Article number | 2207481 |
| Journal | Advanced Science |
| Volume | 10 |
| Issue number | 15 |
| DOIs | |
| State | Published - May 26 2023 |
Funding
The work at Los Alamos National Laboratory was supported by NNSA's Laboratory Directed Research and Development Program, and was performed, in part, at CINT, an Office of Science User Facility operated by the U.S. Department of Energy Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001. Z.J.C., P.R., and Q.X.J. acknowledge the partial support by the U.S. National Science Foundation for work done at the University at Buffalo under award number ECCS-1902623. Z.J.C, P.R., and Q.X.J. also acknowledge the CINT Users Program. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2022R1C1C1005168). Piezoresponse force microscopy research was conducted as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. The work at Los Alamos National Laboratory was supported by NNSA's Laboratory Directed Research and Development Program, and was performed, in part, at CINT, an Office of Science User Facility operated by the U.S. Department of Energy Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001. Z.J.C., P.R., and Q.X.J. acknowledge the partial support by the U.S. National Science Foundation for work done at the University at Buffalo under award number ECCS‐1902623. Z.J.C, P.R., and Q.X.J. also acknowledge the CINT Users Program. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2022R1C1C1005168). Piezoresponse force microscopy research was conducted as part of a user project at the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory.
Keywords
- freestanding oxide membranes
- magnetic anisotropy reorientation
- magnetoelectric coupling
- multiferroics